AKG Acoustics AS 8 TC User manual

Brand: AKG Acoustics

Model: AS 8 TC

Category: Musical Equipment

Type: User manual

This manual is also suitable for

AS 8/AS 8 TC

Automatic Microphone Mixers

Description

While preserving the basic benefits of NOM attenuation and

minimum recirculated sound, the AS 8 adds extremely simple

setup, a seamless automatic mixing algorithm and low cost.

State of the art analog audio circuitry is digitally controlled

with a patented algorithm to provide exceptional

performance and value.

The Patented Adaptive Proportional Gain* algorithm is a

unique process that allocates the gain applied to each

channel after comparing the individual channel level with an

overall reference level. The reference level is a mix of all

active channels, so it automatically adapts to varying

background noise levels in the room. The channel with the

most signal receives the most gain. In addition to the

adaptive gain allocation, the algorithm also provides an

"intelligence" that prevents background noise and non-

speech sounds from interfering with the auto mixing function.

The algorithm also keeps track of which channel has been

the most active (loudest for the longest time period) and

skews a priority toward that channel. The automatic skewing

is damped to keep it from responding to brief signal

transients. A very smooth compressor/leveler is included to

add an important finishing touch, making the AS 8 a

complete automatic level control system. The

compressor/leveler can protect amplifiers from overload and

maintains a consistent audio level with varying voice levels at

the microphones.

The AS 8 was designed to operate with any type of

microphone or line level source. DIP switches on the rear

panel adjust the preamp gain range for the input level. Front

panel controls provide a fine adjustment for an exact match

into whatever component follows the AS 8 in the signal

chain.

Simple, accurate level adjustment is assured by a single

front panel knob for each channel, which simultaneously

adjusts the input gain and the level of participation in the

gain allocation. Individual channel levels can be accurately

adjusted by ear, using nothing other than a talker's voice as a

sound source.

The AS 8 is easily configured for transparent operation in

any sound reinforcement, teleconferencing or recording

application. Multiple units can be "daisy chained" for more

than 8 channels. Connections for remote control pots or

switches are provided for individual channels and for the

overall mixed output.

An RS-232 port allows most of the functions of the AS 8 to

be controlled either by a computer or a dedicated control

system such as AMX or Crestron. The current version of the

software can also be downloaded from the Web site.

The AS 8 TC features low and high frequency shelving

controls on each inputchannel.

ÂMX

is a registered trademark of AMX Corp.

Crestron

is a trademark of Crestron Electronics, Inc. USA

*US Patent Numbers: 5,414,776 and 5,402,500

Features

• Direct and mixed outputs

• Mic/line selectable inputs

• Built in Compressor/Leveler

• Expansion ports for larger systems

• Patented Adaptive Proportional

Gain mixing algorithm*

• Low and high frequency shelving

controls on each channel (AS8TC)

• RS-232 controllable - AMX

and

Crestron

compatible

Specifications

Mic/Line Input type: Balanced and RF filtered

Impedance: >2.5K, any gain

Input Gain Settings: 0dB, +30dB, +50dB

EIN, 20-20KHz: -126dB (+50dB gain)

Maximum Input Level: +20dBu at 0dB gain

-10dBu at +30dB gain

-30dBu at +50dB gain

Remote Level Control Range: 6dB/Volt; 0 to 5V + off

Compressor/Leveller: Threshold: -40dBu to 0dBu

Maximum Gain Reduction: 25dB

Tone Controls (AS8TC): Shelving type

Turnover freq: 1 kHz

+/-10 dB at 100 Hz

+/-10 dB at 1kHz

Maximum System Gain: 75dB (input to main out)

System THD: <0.1%; +10dBu out at any gain setting

System IMD: <0.1%; +10dBu out at any gain setting

Phantom Power: +15V (selectable per channel)

Power Consumption: 10 Watts max. @ 20VAC

Weight: 3 lbs., 4 ozs.

Dimensions: 1

/4 x 8 x 19 inches

Microphones · Headphones · Wireless Microphones · Wireless Headphones · Headsets · Electroacoustical Components

Limited Warranty

Valid only in the United States. AKG Acoustics warrants AKG products against defects in material

or workmanship for a period of two years from the date of original purchase for use, and agrees to

repair or, at our option, replace any defective unit without charge for either parts or labor. Important:

This warranty does not cover damage resulting from accident, misuse or abuse, lack of reasonable

care, the affixing of any attachment not provided with the product, loss of parts or connecting the

product to any but the specified receptacles. This warranty is void unless service or repairs are

performed by an authorized service center. No responsibility is assumed for any special, incidental

or consequential damages. However, the limitation of any right or remedy shall not be effective

where such is prohibited or restricted by law. Simply take or ship your AKG product prepaid to our

service department. Be sure to include your sales slip as proof of purchase date. (We will not repair

transit damage under the no-charge terms of this warranty.) Note: No other warranty, written or oral

is authorized by AKG Acoustics, Inc. This warranty gives you specific legal rights, and you may also

have other rights which vary from state to state. Some states do not allow the exclusion or

limitation of incidental or consequential damages or limitation on how long an implied warranty

lasts, so the above exclusions and limitation may not apply to you.

Specifications subject to change without notice.

AKG Acoustics GmbH

Lemböckgasse 21–25, P.O.B. 158, A-1230

Vienna/AUSTRIA

Tel: (43 1) 86 654-0*, Fax: (43 1) 86 654-516

Internet: http://www.akg.com

AKG Acoustics; A Division of Harman Pro Germany

Bodenseestraße 228, D-81243 München/GERMANY

Tel: (089) 87 16-0, Fax: (089) 87 16-200

Arbiter Pro Audio

Wilberforce Road, London NW9 6AX/ENGLAND

Tel: (0181) 202 1199, Fax: (0181) 202 7076

AKG ACOUSTICS, U.S.

914 Airpark Center Drive

Nashville, TN 37217, U.S.A.

Tel: (615) 620-3800, Fax: (615) 620-3875

Studer Japan Ltd.

2-43-7, Uehara, Shibuya-ku, Tokyo 151-0064/JAPAN

Tel: (813) 3465-2211, Fax: (813) 3465-2214

Erikson Pro Audio

620 McCaffrey, St-Laurent, Quebec, H4T 1N1, CANADA

Tel: (514) 738-3000, Fax: (514) 737-5069

Internet: www.jam-ind.com/eriksonpro

AKG is constantly improving and modifying its products, therefore, specifications are subject to change without notice.

The automatic microphone mixer shall incorporate an adaptive

proportional gain mixing technique and automatic skewing

between input channels to minimize comb filtering. The mixer shall

contain eight input channels. Each input shall be electronically

balanced and be capable of receiving mic or line level input

signals. Phantom power shall be provided for each input as well

as a direct output. (For Model AS 8 TC: Each input shall

incorporate both a high frequency and low frequency tone control.)

The main output shall be electronically balanced and have an

integral compressor/leveler and master level control. Expansion

ports shall provide IO access to the main and mix audio busses.

The mixer shall be controllable via an RS-232 serial port and shall

adhere to the LecNet

communication protocol. The mixer shall

meet the following performance criteria. Frequency response: 20

Hz - 20 kHz. THD < 0.1% @ +10 dBu output. IMD < 0.1% @ +10

dBu output. Input Impedance: > 2.5K ohm. Maximum Input Level:

+20 dBu @ 0 dB setting; -10 dBu @ +30 dB setting; -30 dBu @

+50 dB setting. Equivalent Input Noise: -126 dB @ +50 dB gain.

Maximum Output Level: +26 dBu. Maximum Gain: 75 dB (input to

output). The mixer shall be rack mountable and occupy 1 RU. The

automatic microphone mixer shall be the AKG Acoustics

Model AS 8 (AS 8 TC).

Architects and Engineers Specifications

DS-AS 8/AS 8 TC

Graphical Data

AKG Acoustics AS 8 TC User manual

Brand: AKG Acoustics

Model: AS 8 TC

Category: Musical Equipment

Type: User manual

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